Trees of Wisconsin
Key to Gymnosperms of Northeastern Wisconsin
| 6. Bark of trunk reddish, often forming broad, smooth "plates"; needles snap cleanly when bent double; native species, seldom planted in yards or along streets, although often found in large "plantations" in northern Wisconsin. |  |
Pinus resinosa |
| 6. Bark of trunk dark gray to blackish, fissured and not forming smooth plates; needles do not snap cleanly when bent double; cultivated species in yards primarily. |  |
Pinus nigra |